enable distribution otlp tracing

src/main/kotlin/com/example/demo/config/AppConfig.kt

@@ -13,7 +13,11 @@ import com.example.demo.services.validation.SchemaValidator
 import com.fasterxml.jackson.databind.ObjectMapper
 import com.fasterxml.jackson.databind.SerializationFeature
 import com.fasterxml.jackson.datatype.jsr310.JavaTimeModule
+import io.micrometer.observation.ObservationRegistry
+import io.micrometer.observation.aop.ObservedAspect
+import io.opentelemetry.exporter.otlp.http.trace.OtlpHttpSpanExporter
 import org.springframework.beans.factory.annotation.Autowired
+import org.springframework.beans.factory.annotation.Value
 import org.springframework.boot.context.properties.EnableConfigurationProperties
 import org.springframework.context.annotation.Bean
 import org.springframework.context.annotation.Configuration
@@ -50,5 +54,17 @@ class AppConfig(
 
     @Bean
     fun schemaValidator(): SchemaValidator = SchemaValidator(kafkaProperties.validation.schema)
+
+    @Bean
+    fun otlpHttpSpanExporter(@Value("\${tracing.url}") url: String): OtlpHttpSpanExporter {
+        return OtlpHttpSpanExporter.builder()
+            .setEndpoint(url)
+            .build()
+    }
+
+    @Bean
+    fun observedAspect(@Autowired observationRegistry: ObservationRegistry): ObservedAspect {
+        return ObservedAspect(observationRegistry)
+    }
 }
 

src/main/resources/application.yml

@@ -59,4 +59,10 @@ management:
   metrics:
     distribution:
       percentiles-histogram:
-        "[http.server.requests]": true
+        "[http.server.requests]": true
+  tracing:
+    sampling:
+      probability: 1.0
+
+tracing:
+  url: ${OTLP_TRACING_HTTP_URL:http://localhost:4318/v1/traces}